mellen



D. F. MELLEN, oF wnN'lWQ-BTH, NEW HAMPsninn, assienon'ro D. E, MELLEN, JOHN F.

AUGUSTUS. AND SAMUEL Af EATON,-

MACHINE FOR PLANING METALS.

To all whom t may concern.'

Be it known that I, D. F. MELLEN, of Wentworth, in the county of Grafton and State of New Hampshire, have invented certain new and useful Improvements in Machines for Planing Metals, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, making part of this specification, in which- Figure 1 is an end view of a planing machine with my improvement attached; Fig. 2 a side view of the same; Fig. 3 a plan of my improved apparatus detached from the machine; Fig. 4 a longitudinal section through the machine; Fig. 5 a transverse section upon the line A, A, of Fig. 4; Figs. 6, 7, and 8, details which will be hereafter referred to.

In the machines heretofore contrived for the purpose of planing curves, an arm has been extended out from one side of the machine, of a length e ual to the radius of the attest curve tobe p aned, and having a variable center, to adapt it to the radii of the different curves to be planed. This arrangement is objectionable on account of the great rplom required by the apparatus in the works op. I

To obviate this inconvenience and toproduce a machine capable of planing curves of any desired radius is the object of my pres- .ent invention.

To enable others skilled in the art to make and use my invention, I will proceed to describe its -construction and operation.

The main features of the machine as represented in the drawings do not differ from those of others of this class and needV not therefore be described.

A, is the carriage which is caused to slide longitudinally beneath the cutter N, secured tothe cutter-head O, which latter slides in the dove-tail groove P, and is operated vertically by the screw Q, and horizontally by the screw R, in the usual manner. Motion is 'communicated to the carriage A,by the co-g wheel B, upon the shaft C, which engages with the rack D, upon its under surface.

E is a circular table of the form represented in Figs. 2 and 3, which is pivoted to the carriage F, and guided in its motion around its center by the grooves in the short standards G, which are secured to the carriage by screws a or otherwise.

H, is a stationary rack-bar att-ached to one of the posts of the machine.

I is a cog-wheel which is pivoted to the sliding carriage and engages withy the stationary rack-bar H, Fig. 3. Attached to this wheel is another ar K, of smaller diameter, the two turning upon a common pivot in the carriage.

L, is a rack-bar which is pivoted to the table E, by a pin M, passing through one or other of the holes B, Figs. 2, 3, and 4. From the connections thus explained it is evident that as the carriage is moved longitudinally, the wheel I is turned by the rack H, the wheel K, which revolves with I, giving motion to the rack-bar` L, by which means the table E, is revolved upon its center as it travels longitudinally with the carriage, and any article clamped thereon will be laned in a curve the radius of which will epend upon the distance of the pin M from the center of the revolving table. rllhe table E may be perforated with any desired number of holes b; the distances of which from the center of the table vary in accordance with the radii of the different curves to be planed. In order still further to increase the capability of the machine, the wheels I and K are so arranged that they may be made to change places with each other', by which means the relation between the longitudinal motion of the carriage and the circular motion of the 'table may be still further varied, and by the use of other cog-wheels having different -relations to each other, the capabilities of the machine may also be still further increased. In Fig. 2, the smaller wheel K, is in gear with the stationary rack H, and the large wheel I with the rack L. In Fig. 3, the reverse of this arrangement is represented.

.This apparatus may be applied to any ordinary planing machine and when not in use may be removed therefrom; it requires neither additional room for its accommodation, nor complicated machinery for its operation. By its use cams of any degree of curvature may be planed as rapidly and exactly as arforth, the rotary motion of the table being tcles of rectilinear contour may be planed dependent upon the longitudinal motion of upon an ordinary planing machine. the carriage.

What I claim as my invention and desire DUSTIN F. MELLEN. 5 to secure by Letters Patent isi `Witnessesz The 'oircular table E, construoted and op- SAMCOOPER,l

erated 1n the manner substantially as set-4 JoHN` S. CLoW. 

